3 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifdef USB_GLOBAL_INCLUDE_FILE
30 #include USB_GLOBAL_INCLUDE_FILE
32 #include <sys/stdint.h>
33 #include <sys/stddef.h>
34 #include <sys/param.h>
35 #include <sys/queue.h>
36 #include <sys/types.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
40 #include <sys/module.h>
42 #include <sys/mutex.h>
43 #include <sys/condvar.h>
44 #include <sys/sysctl.h>
46 #include <sys/unistd.h>
47 #include <sys/callout.h>
48 #include <sys/malloc.h>
51 #include <dev/usb/usb.h>
52 #include <dev/usb/usbdi.h>
53 #include <dev/usb/usbdi_util.h>
55 #define USB_DEBUG_VAR usb_debug
57 #include <dev/usb/usb_core.h>
58 #include <dev/usb/usb_busdma.h>
59 #include <dev/usb/usb_process.h>
60 #include <dev/usb/usb_transfer.h>
61 #include <dev/usb/usb_device.h>
62 #include <dev/usb/usb_debug.h>
63 #include <dev/usb/usb_util.h>
65 #include <dev/usb/usb_controller.h>
66 #include <dev/usb/usb_bus.h>
67 #include <dev/usb/usb_pf.h>
68 #endif /* USB_GLOBAL_INCLUDE_FILE */
70 struct usb_std_packet_size {
72 uint16_t min; /* inclusive */
73 uint16_t max; /* inclusive */
79 static usb_callback_t usb_request_callback;
81 static const struct usb_config usb_control_ep_cfg[USB_CTRL_XFER_MAX] = {
83 /* This transfer is used for generic control endpoint transfers */
87 .endpoint = 0x00, /* Control endpoint */
88 .direction = UE_DIR_ANY,
89 .bufsize = USB_EP0_BUFSIZE, /* bytes */
90 .flags = {.proxy_buffer = 1,},
91 .callback = &usb_request_callback,
92 .usb_mode = USB_MODE_DUAL, /* both modes */
95 /* This transfer is used for generic clear stall only */
99 .endpoint = 0x00, /* Control pipe */
100 .direction = UE_DIR_ANY,
101 .bufsize = sizeof(struct usb_device_request),
102 .callback = &usb_do_clear_stall_callback,
103 .timeout = 1000, /* 1 second */
104 .interval = 50, /* 50ms */
105 .usb_mode = USB_MODE_HOST,
109 static const struct usb_config usb_control_ep_quirk_cfg[USB_CTRL_XFER_MAX] = {
111 /* This transfer is used for generic control endpoint transfers */
115 .endpoint = 0x00, /* Control endpoint */
116 .direction = UE_DIR_ANY,
117 .bufsize = 65535, /* bytes */
118 .callback = &usb_request_callback,
119 .usb_mode = USB_MODE_DUAL, /* both modes */
122 /* This transfer is used for generic clear stall only */
126 .endpoint = 0x00, /* Control pipe */
127 .direction = UE_DIR_ANY,
128 .bufsize = sizeof(struct usb_device_request),
129 .callback = &usb_do_clear_stall_callback,
130 .timeout = 1000, /* 1 second */
131 .interval = 50, /* 50ms */
132 .usb_mode = USB_MODE_HOST,
136 /* function prototypes */
138 static void usbd_update_max_frame_size(struct usb_xfer *);
139 static void usbd_transfer_unsetup_sub(struct usb_xfer_root *, uint8_t);
140 static void usbd_control_transfer_init(struct usb_xfer *);
141 static int usbd_setup_ctrl_transfer(struct usb_xfer *);
142 static void usb_callback_proc(struct usb_proc_msg *);
143 static void usbd_callback_ss_done_defer(struct usb_xfer *);
144 static void usbd_callback_wrapper(struct usb_xfer_queue *);
145 static void usbd_transfer_start_cb(void *);
146 static uint8_t usbd_callback_wrapper_sub(struct usb_xfer *);
147 static void usbd_get_std_packet_size(struct usb_std_packet_size *ptr,
148 uint8_t type, enum usb_dev_speed speed);
150 /*------------------------------------------------------------------------*
151 * usb_request_callback
152 *------------------------------------------------------------------------*/
154 usb_request_callback(struct usb_xfer *xfer, usb_error_t error)
156 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE)
157 usb_handle_request_callback(xfer, error);
159 usbd_do_request_callback(xfer, error);
162 /*------------------------------------------------------------------------*
163 * usbd_update_max_frame_size
165 * This function updates the maximum frame size, hence high speed USB
166 * can transfer multiple consecutive packets.
167 *------------------------------------------------------------------------*/
169 usbd_update_max_frame_size(struct usb_xfer *xfer)
171 /* compute maximum frame size */
172 /* this computation should not overflow 16-bit */
173 /* max = 15 * 1024 */
175 xfer->max_frame_size = xfer->max_packet_size * xfer->max_packet_count;
178 /*------------------------------------------------------------------------*
181 * The following function is called when we need to
182 * synchronize with DMA hardware.
185 * 0: no DMA delay required
186 * Else: milliseconds of DMA delay
187 *------------------------------------------------------------------------*/
189 usbd_get_dma_delay(struct usb_device *udev)
191 const struct usb_bus_methods *mtod;
194 mtod = udev->bus->methods;
197 if (mtod->get_dma_delay) {
198 (mtod->get_dma_delay) (udev, &temp);
200 * Round up and convert to milliseconds. Note that we use
201 * 1024 milliseconds per second. to save a division.
209 /*------------------------------------------------------------------------*
210 * usbd_transfer_setup_sub_malloc
212 * This function will allocate one or more DMA'able memory chunks
213 * according to "size", "align" and "count" arguments. "ppc" is
214 * pointed to a linear array of USB page caches afterwards.
216 * If the "align" argument is equal to "1" a non-contiguous allocation
217 * can happen. Else if the "align" argument is greater than "1", the
218 * allocation will always be contiguous in memory.
223 *------------------------------------------------------------------------*/
226 usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm,
227 struct usb_page_cache **ppc, usb_size_t size, usb_size_t align,
230 struct usb_page_cache *pc;
241 USB_ASSERT(align > 0, ("Invalid alignment, 0x%08x\n",
243 USB_ASSERT(size > 0, ("Invalid size = 0\n"));
246 return (0); /* nothing to allocate */
249 * Make sure that the size is aligned properly.
251 size = -((-size) & (-align));
254 * Try multi-allocation chunks to reduce the number of DMA
255 * allocations, hence DMA allocations are slow.
258 /* special case - non-cached multi page DMA memory */
260 n_dma_pg = (2 + (size / USB_PAGE_SIZE));
262 } else if (size >= USB_PAGE_SIZE) {
267 /* compute number of objects per page */
268 #ifdef USB_DMA_SINGLE_ALLOC
271 n_obj = (USB_PAGE_SIZE / size);
274 * Compute number of DMA chunks, rounded up
277 n_dma_pc = howmany(count, n_obj);
282 * DMA memory is allocated once, but mapped twice. That's why
283 * there is one list for auto-free and another list for
284 * non-auto-free which only holds the mapping and not the
287 if (parm->buf == NULL) {
288 /* reserve memory (auto-free) */
289 parm->dma_page_ptr += n_dma_pc * n_dma_pg;
290 parm->dma_page_cache_ptr += n_dma_pc;
292 /* reserve memory (no-auto-free) */
293 parm->dma_page_ptr += count * n_dma_pg;
294 parm->xfer_page_cache_ptr += count;
297 for (x = 0; x != n_dma_pc; x++) {
298 /* need to initialize the page cache */
299 parm->dma_page_cache_ptr[x].tag_parent =
300 &parm->curr_xfer->xroot->dma_parent_tag;
302 for (x = 0; x != count; x++) {
303 /* need to initialize the page cache */
304 parm->xfer_page_cache_ptr[x].tag_parent =
305 &parm->curr_xfer->xroot->dma_parent_tag;
310 *ppc = parm->xfer_page_cache_ptr;
312 *ppc = parm->dma_page_cache_ptr;
314 r = count; /* set remainder count */
315 z = n_obj * size; /* set allocation size */
316 pc = parm->xfer_page_cache_ptr;
317 pg = parm->dma_page_ptr;
321 * Avoid mapping memory twice if only a single object
322 * should be allocated per page cache:
324 for (x = 0; x != n_dma_pc; x++) {
325 if (usb_pc_alloc_mem(parm->dma_page_cache_ptr,
327 return (1); /* failure */
329 /* Make room for one DMA page cache and "n_dma_pg" pages */
330 parm->dma_page_cache_ptr++;
334 for (x = 0; x != n_dma_pc; x++) {
337 /* compute last remainder */
341 if (usb_pc_alloc_mem(parm->dma_page_cache_ptr,
343 return (1); /* failure */
345 /* Set beginning of current buffer */
346 buf = parm->dma_page_cache_ptr->buffer;
347 /* Make room for one DMA page cache and "n_dma_pg" pages */
348 parm->dma_page_cache_ptr++;
351 for (y = 0; (y != n_obj); y++, r--, pc++, pg += n_dma_pg) {
353 /* Load sub-chunk into DMA */
354 if (usb_pc_dmamap_create(pc, size)) {
355 return (1); /* failure */
357 pc->buffer = USB_ADD_BYTES(buf, y * size);
360 USB_MTX_LOCK(pc->tag_parent->mtx);
361 if (usb_pc_load_mem(pc, size, 1 /* synchronous */ )) {
362 USB_MTX_UNLOCK(pc->tag_parent->mtx);
363 return (1); /* failure */
365 USB_MTX_UNLOCK(pc->tag_parent->mtx);
370 parm->xfer_page_cache_ptr = pc;
371 parm->dma_page_ptr = pg;
376 /*------------------------------------------------------------------------*
377 * usbd_get_max_frame_length
379 * This function returns the maximum single frame length as computed by
380 * usbd_transfer_setup(). It is useful when computing buffer sizes for
381 * devices having multiple alternate settings. The SuperSpeed endpoint
382 * companion pointer is allowed to be NULL.
383 *------------------------------------------------------------------------*/
385 usbd_get_max_frame_length(const struct usb_endpoint_descriptor *edesc,
386 const struct usb_endpoint_ss_comp_descriptor *ecomp,
387 enum usb_dev_speed speed)
389 uint32_t max_packet_size;
390 uint32_t max_packet_count;
393 max_packet_size = UGETW(edesc->wMaxPacketSize);
394 max_packet_count = 1;
395 type = (edesc->bmAttributes & UE_XFERTYPE);
403 (max_packet_size >> 11) & 3;
405 /* check for invalid max packet count */
406 if (max_packet_count > 3)
407 max_packet_count = 3;
412 max_packet_size &= 0x7FF;
414 case USB_SPEED_SUPER:
415 max_packet_count += (max_packet_size >> 11) & 3;
418 max_packet_count += ecomp->bMaxBurst;
420 if ((max_packet_count == 0) ||
421 (max_packet_count > 16))
422 max_packet_count = 16;
426 max_packet_count = 1;
432 mult = UE_GET_SS_ISO_MULT(
433 ecomp->bmAttributes) + 1;
437 max_packet_count *= mult;
443 max_packet_size &= 0x7FF;
448 return (max_packet_size * max_packet_count);
451 /*------------------------------------------------------------------------*
452 * usbd_transfer_setup_sub - transfer setup subroutine
454 * This function must be called from the "xfer_setup" callback of the
455 * USB Host or Device controller driver when setting up an USB
456 * transfer. This function will setup correct packet sizes, buffer
457 * sizes, flags and more, that are stored in the "usb_xfer"
459 *------------------------------------------------------------------------*/
461 usbd_transfer_setup_sub(struct usb_setup_params *parm)
467 struct usb_xfer *xfer = parm->curr_xfer;
468 const struct usb_config *setup = parm->curr_setup;
469 struct usb_endpoint_ss_comp_descriptor *ecomp;
470 struct usb_endpoint_descriptor *edesc;
471 struct usb_std_packet_size std_size;
472 usb_frcount_t n_frlengths;
473 usb_frcount_t n_frbuffers;
480 * Sanity check. The following parameters must be initialized before
481 * calling this function.
483 if ((parm->hc_max_packet_size == 0) ||
484 (parm->hc_max_packet_count == 0) ||
485 (parm->hc_max_frame_size == 0)) {
486 parm->err = USB_ERR_INVAL;
489 edesc = xfer->endpoint->edesc;
490 ecomp = xfer->endpoint->ecomp;
492 type = (edesc->bmAttributes & UE_XFERTYPE);
494 xfer->flags = setup->flags;
495 xfer->nframes = setup->frames;
496 xfer->timeout = setup->timeout;
497 xfer->callback = setup->callback;
498 xfer->interval = setup->interval;
499 xfer->endpointno = edesc->bEndpointAddress;
500 xfer->max_packet_size = UGETW(edesc->wMaxPacketSize);
501 xfer->max_packet_count = 1;
502 /* make a shadow copy: */
503 xfer->flags_int.usb_mode = parm->udev->flags.usb_mode;
505 parm->bufsize = setup->bufsize;
507 switch (parm->speed) {
512 xfer->max_packet_count +=
513 (xfer->max_packet_size >> 11) & 3;
515 /* check for invalid max packet count */
516 if (xfer->max_packet_count > 3)
517 xfer->max_packet_count = 3;
522 xfer->max_packet_size &= 0x7FF;
524 case USB_SPEED_SUPER:
525 xfer->max_packet_count += (xfer->max_packet_size >> 11) & 3;
528 xfer->max_packet_count += ecomp->bMaxBurst;
530 if ((xfer->max_packet_count == 0) ||
531 (xfer->max_packet_count > 16))
532 xfer->max_packet_count = 16;
536 xfer->max_packet_count = 1;
542 mult = UE_GET_SS_ISO_MULT(
543 ecomp->bmAttributes) + 1;
547 xfer->max_packet_count *= mult;
553 xfer->max_packet_size &= 0x7FF;
558 /* range check "max_packet_count" */
560 if (xfer->max_packet_count > parm->hc_max_packet_count) {
561 xfer->max_packet_count = parm->hc_max_packet_count;
564 /* store max packet size value before filtering */
566 maxp_old = xfer->max_packet_size;
568 /* filter "wMaxPacketSize" according to HC capabilities */
570 if ((xfer->max_packet_size > parm->hc_max_packet_size) ||
571 (xfer->max_packet_size == 0)) {
572 xfer->max_packet_size = parm->hc_max_packet_size;
574 /* filter "wMaxPacketSize" according to standard sizes */
576 usbd_get_std_packet_size(&std_size, type, parm->speed);
578 if (std_size.range.min || std_size.range.max) {
580 if (xfer->max_packet_size < std_size.range.min) {
581 xfer->max_packet_size = std_size.range.min;
583 if (xfer->max_packet_size > std_size.range.max) {
584 xfer->max_packet_size = std_size.range.max;
588 if (xfer->max_packet_size >= std_size.fixed[3]) {
589 xfer->max_packet_size = std_size.fixed[3];
590 } else if (xfer->max_packet_size >= std_size.fixed[2]) {
591 xfer->max_packet_size = std_size.fixed[2];
592 } else if (xfer->max_packet_size >= std_size.fixed[1]) {
593 xfer->max_packet_size = std_size.fixed[1];
595 /* only one possibility left */
596 xfer->max_packet_size = std_size.fixed[0];
601 * Check if the max packet size was outside its allowed range
602 * and clamped to a valid value:
604 if (maxp_old != xfer->max_packet_size)
605 xfer->flags_int.maxp_was_clamped = 1;
607 /* compute "max_frame_size" */
609 usbd_update_max_frame_size(xfer);
611 /* check interrupt interval and transfer pre-delay */
613 if (type == UE_ISOCHRONOUS) {
615 uint16_t frame_limit;
617 xfer->interval = 0; /* not used, must be zero */
618 xfer->flags_int.isochronous_xfr = 1; /* set flag */
620 if (xfer->timeout == 0) {
622 * set a default timeout in
623 * case something goes wrong!
625 xfer->timeout = 1000 / 4;
627 switch (parm->speed) {
630 frame_limit = USB_MAX_FS_ISOC_FRAMES_PER_XFER;
634 frame_limit = USB_MAX_HS_ISOC_FRAMES_PER_XFER;
635 xfer->fps_shift = edesc->bInterval;
636 if (xfer->fps_shift > 0)
638 if (xfer->fps_shift > 3)
640 if (xfer->flags.pre_scale_frames != 0)
641 xfer->nframes <<= (3 - xfer->fps_shift);
645 if (xfer->nframes > frame_limit) {
647 * this is not going to work
650 parm->err = USB_ERR_INVAL;
653 if (xfer->nframes == 0) {
655 * this is not a valid value
657 parm->err = USB_ERR_ZERO_NFRAMES;
663 * If a value is specified use that else check the
664 * endpoint descriptor!
666 if (type == UE_INTERRUPT) {
670 if (xfer->interval == 0) {
672 xfer->interval = edesc->bInterval;
674 switch (parm->speed) {
680 if (xfer->interval < 4)
682 else if (xfer->interval > 16)
683 xfer->interval = (1 << (16 - 4));
686 (1 << (xfer->interval - 4));
691 if (xfer->interval == 0) {
693 * One millisecond is the smallest
694 * interval we support:
702 while ((temp != 0) && (temp < xfer->interval)) {
707 switch (parm->speed) {
712 xfer->fps_shift += 3;
719 * NOTE: we do not allow "max_packet_size" or "max_frame_size"
720 * to be equal to zero when setting up USB transfers, hence
721 * this leads to a lot of extra code in the USB kernel.
724 if ((xfer->max_frame_size == 0) ||
725 (xfer->max_packet_size == 0)) {
729 if ((parm->bufsize <= MIN_PKT) &&
730 (type != UE_CONTROL) &&
734 xfer->max_packet_size = MIN_PKT;
735 xfer->max_packet_count = 1;
736 parm->bufsize = 0; /* automatic setup length */
737 usbd_update_max_frame_size(xfer);
740 parm->err = USB_ERR_ZERO_MAXP;
749 * check if we should setup a default
753 if (parm->bufsize == 0) {
755 parm->bufsize = xfer->max_frame_size;
757 if (type == UE_ISOCHRONOUS) {
758 parm->bufsize *= xfer->nframes;
762 * check if we are about to setup a proxy
766 if (xfer->flags.proxy_buffer) {
768 /* round bufsize up */
770 parm->bufsize += (xfer->max_frame_size - 1);
772 if (parm->bufsize < xfer->max_frame_size) {
773 /* length wrapped around */
774 parm->err = USB_ERR_INVAL;
777 /* subtract remainder */
779 parm->bufsize -= (parm->bufsize % xfer->max_frame_size);
781 /* add length of USB device request structure, if any */
783 if (type == UE_CONTROL) {
784 parm->bufsize += REQ_SIZE; /* SETUP message */
787 xfer->max_data_length = parm->bufsize;
789 /* Setup "n_frlengths" and "n_frbuffers" */
791 if (type == UE_ISOCHRONOUS) {
792 n_frlengths = xfer->nframes;
796 if (type == UE_CONTROL) {
797 xfer->flags_int.control_xfr = 1;
798 if (xfer->nframes == 0) {
799 if (parm->bufsize <= REQ_SIZE) {
801 * there will never be any data
810 if (xfer->nframes == 0) {
815 n_frlengths = xfer->nframes;
816 n_frbuffers = xfer->nframes;
820 * check if we have room for the
821 * USB device request structure:
824 if (type == UE_CONTROL) {
826 if (xfer->max_data_length < REQ_SIZE) {
827 /* length wrapped around or too small bufsize */
828 parm->err = USB_ERR_INVAL;
831 xfer->max_data_length -= REQ_SIZE;
834 * Setup "frlengths" and shadow "frlengths" for keeping the
835 * initial frame lengths when a USB transfer is complete. This
836 * information is useful when computing isochronous offsets.
838 xfer->frlengths = parm->xfer_length_ptr;
839 parm->xfer_length_ptr += 2 * n_frlengths;
841 /* setup "frbuffers" */
842 xfer->frbuffers = parm->xfer_page_cache_ptr;
843 parm->xfer_page_cache_ptr += n_frbuffers;
845 /* initialize max frame count */
846 xfer->max_frame_count = xfer->nframes;
849 * check if we need to setup
853 if (!xfer->flags.ext_buffer) {
855 struct usb_page_search page_info;
856 struct usb_page_cache *pc;
858 if (usbd_transfer_setup_sub_malloc(parm,
859 &pc, parm->bufsize, 1, 1)) {
860 parm->err = USB_ERR_NOMEM;
861 } else if (parm->buf != NULL) {
863 usbd_get_page(pc, 0, &page_info);
865 xfer->local_buffer = page_info.buffer;
867 usbd_xfer_set_frame_offset(xfer, 0, 0);
869 if ((type == UE_CONTROL) && (n_frbuffers > 1)) {
870 usbd_xfer_set_frame_offset(xfer, REQ_SIZE, 1);
875 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
877 if (parm->buf != NULL) {
879 USB_ADD_BYTES(parm->buf, parm->size[0]);
881 usbd_xfer_set_frame_offset(xfer, 0, 0);
883 if ((type == UE_CONTROL) && (n_frbuffers > 1)) {
884 usbd_xfer_set_frame_offset(xfer, REQ_SIZE, 1);
887 parm->size[0] += parm->bufsize;
889 /* align data again */
890 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
894 * Compute maximum buffer size
897 if (parm->bufsize_max < parm->bufsize) {
898 parm->bufsize_max = parm->bufsize;
901 if (xfer->flags_int.bdma_enable) {
903 * Setup "dma_page_ptr".
905 * Proof for formula below:
907 * Assume there are three USB frames having length "a", "b" and
908 * "c". These USB frames will at maximum need "z"
909 * "usb_page" structures. "z" is given by:
911 * z = ((a / USB_PAGE_SIZE) + 2) + ((b / USB_PAGE_SIZE) + 2) +
912 * ((c / USB_PAGE_SIZE) + 2);
914 * Constraining "a", "b" and "c" like this:
916 * (a + b + c) <= parm->bufsize
920 * z <= ((parm->bufsize / USB_PAGE_SIZE) + (3*2));
922 * Here is the general formula:
924 xfer->dma_page_ptr = parm->dma_page_ptr;
925 parm->dma_page_ptr += (2 * n_frbuffers);
926 parm->dma_page_ptr += (parm->bufsize / USB_PAGE_SIZE);
930 /* correct maximum data length */
931 xfer->max_data_length = 0;
933 /* subtract USB frame remainder from "hc_max_frame_size" */
935 xfer->max_hc_frame_size =
936 (parm->hc_max_frame_size -
937 (parm->hc_max_frame_size % xfer->max_frame_size));
939 if (xfer->max_hc_frame_size == 0) {
940 parm->err = USB_ERR_INVAL;
944 /* initialize frame buffers */
947 for (x = 0; x != n_frbuffers; x++) {
948 xfer->frbuffers[x].tag_parent =
949 &xfer->xroot->dma_parent_tag;
951 if (xfer->flags_int.bdma_enable &&
952 (parm->bufsize_max > 0)) {
954 if (usb_pc_dmamap_create(
956 parm->bufsize_max)) {
957 parm->err = USB_ERR_NOMEM;
967 * Set some dummy values so that we avoid division by zero:
969 xfer->max_hc_frame_size = 1;
970 xfer->max_frame_size = 1;
971 xfer->max_packet_size = 1;
972 xfer->max_data_length = 0;
974 xfer->max_frame_count = 0;
979 usbd_transfer_setup_has_bulk(const struct usb_config *setup_start,
983 uint8_t type = setup_start[n_setup].type;
984 if (type == UE_BULK || type == UE_BULK_INTR ||
991 /*------------------------------------------------------------------------*
992 * usbd_transfer_setup - setup an array of USB transfers
994 * NOTE: You must always call "usbd_transfer_unsetup" after calling
995 * "usbd_transfer_setup" if success was returned.
997 * The idea is that the USB device driver should pre-allocate all its
998 * transfers by one call to this function.
1003 *------------------------------------------------------------------------*/
1005 usbd_transfer_setup(struct usb_device *udev,
1006 const uint8_t *ifaces, struct usb_xfer **ppxfer,
1007 const struct usb_config *setup_start, uint16_t n_setup,
1008 void *priv_sc, struct mtx *xfer_mtx)
1010 const struct usb_config *setup_end = setup_start + n_setup;
1011 const struct usb_config *setup;
1012 struct usb_setup_params *parm;
1013 struct usb_endpoint *ep;
1014 struct usb_xfer_root *info;
1015 struct usb_xfer *xfer;
1017 usb_error_t error = 0;
1022 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1023 "usbd_transfer_setup can sleep!");
1025 /* do some checking first */
1028 DPRINTFN(6, "setup array has zero length!\n");
1029 return (USB_ERR_INVAL);
1031 if (ifaces == NULL) {
1032 DPRINTFN(6, "ifaces array is NULL!\n");
1033 return (USB_ERR_INVAL);
1035 if (xfer_mtx == NULL) {
1036 DPRINTFN(6, "using global lock\n");
1040 /* more sanity checks */
1042 for (setup = setup_start, n = 0;
1043 setup != setup_end; setup++, n++) {
1044 if (setup->bufsize == (usb_frlength_t)-1) {
1045 error = USB_ERR_BAD_BUFSIZE;
1046 DPRINTF("invalid bufsize\n");
1048 if (setup->callback == NULL) {
1049 error = USB_ERR_NO_CALLBACK;
1050 DPRINTF("no callback\n");
1058 /* Protect scratch area */
1059 do_unlock = usbd_ctrl_lock(udev);
1064 parm = &udev->scratch.xfer_setup[0].parm;
1065 memset(parm, 0, sizeof(*parm));
1068 parm->speed = usbd_get_speed(udev);
1069 parm->hc_max_packet_count = 1;
1071 if (parm->speed >= USB_SPEED_MAX) {
1072 parm->err = USB_ERR_INVAL;
1075 /* setup all transfers */
1081 * Initialize the "usb_xfer_root" structure,
1082 * which is common for all our USB transfers.
1084 info = USB_ADD_BYTES(buf, 0);
1086 info->memory_base = buf;
1087 info->memory_size = parm->size[0];
1090 info->dma_page_cache_start = USB_ADD_BYTES(buf, parm->size[4]);
1091 info->dma_page_cache_end = USB_ADD_BYTES(buf, parm->size[5]);
1093 info->xfer_page_cache_start = USB_ADD_BYTES(buf, parm->size[5]);
1094 info->xfer_page_cache_end = USB_ADD_BYTES(buf, parm->size[2]);
1096 cv_init(&info->cv_drain, "WDRAIN");
1098 info->xfer_mtx = xfer_mtx;
1100 usb_dma_tag_setup(&info->dma_parent_tag,
1101 parm->dma_tag_p, udev->bus->dma_parent_tag[0].tag,
1102 xfer_mtx, &usb_bdma_done_event, udev->bus->dma_bits,
1106 info->bus = udev->bus;
1109 TAILQ_INIT(&info->done_q.head);
1110 info->done_q.command = &usbd_callback_wrapper;
1112 TAILQ_INIT(&info->dma_q.head);
1113 info->dma_q.command = &usb_bdma_work_loop;
1115 info->done_m[0].hdr.pm_callback = &usb_callback_proc;
1116 info->done_m[0].xroot = info;
1117 info->done_m[1].hdr.pm_callback = &usb_callback_proc;
1118 info->done_m[1].xroot = info;
1121 * In device side mode control endpoint
1122 * requests need to run from a separate
1123 * context, else there is a chance of
1126 if (setup_start == usb_control_ep_cfg ||
1127 setup_start == usb_control_ep_quirk_cfg)
1129 USB_BUS_CONTROL_XFER_PROC(udev->bus);
1130 else if (xfer_mtx == &Giant)
1132 USB_BUS_GIANT_PROC(udev->bus);
1133 else if (usbd_transfer_setup_has_bulk(setup_start, n_setup))
1135 USB_BUS_NON_GIANT_BULK_PROC(udev->bus);
1138 USB_BUS_NON_GIANT_ISOC_PROC(udev->bus);
1144 parm->size[0] += sizeof(info[0]);
1146 for (setup = setup_start, n = 0;
1147 setup != setup_end; setup++, n++) {
1149 /* skip USB transfers without callbacks: */
1150 if (setup->callback == NULL) {
1153 /* see if there is a matching endpoint */
1154 ep = usbd_get_endpoint(udev,
1155 ifaces[setup->if_index], setup);
1158 * Check that the USB PIPE is valid and that
1159 * the endpoint mode is proper.
1161 * Make sure we don't allocate a streams
1162 * transfer when such a combination is not
1165 if ((ep == NULL) || (ep->methods == NULL) ||
1166 ((ep->ep_mode != USB_EP_MODE_STREAMS) &&
1167 (ep->ep_mode != USB_EP_MODE_DEFAULT)) ||
1168 (setup->stream_id != 0 &&
1169 (setup->stream_id >= USB_MAX_EP_STREAMS ||
1170 (ep->ep_mode != USB_EP_MODE_STREAMS)))) {
1171 if (setup->flags.no_pipe_ok)
1173 if ((setup->usb_mode != USB_MODE_DUAL) &&
1174 (setup->usb_mode != udev->flags.usb_mode))
1176 parm->err = USB_ERR_NO_PIPE;
1180 /* align data properly */
1181 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1183 /* store current setup pointer */
1184 parm->curr_setup = setup;
1188 * Common initialization of the
1189 * "usb_xfer" structure.
1191 xfer = USB_ADD_BYTES(buf, parm->size[0]);
1192 xfer->address = udev->address;
1193 xfer->priv_sc = priv_sc;
1196 usb_callout_init_mtx(&xfer->timeout_handle,
1197 &udev->bus->bus_mtx, 0);
1200 * Setup a dummy xfer, hence we are
1201 * writing to the "usb_xfer"
1202 * structure pointed to by "xfer"
1203 * before we have allocated any
1206 xfer = &udev->scratch.xfer_setup[0].dummy;
1207 memset(xfer, 0, sizeof(*xfer));
1211 /* set transfer endpoint pointer */
1212 xfer->endpoint = ep;
1214 /* set transfer stream ID */
1215 xfer->stream_id = setup->stream_id;
1217 parm->size[0] += sizeof(xfer[0]);
1218 parm->methods = xfer->endpoint->methods;
1219 parm->curr_xfer = xfer;
1222 * Call the Host or Device controller transfer
1225 (udev->bus->methods->xfer_setup) (parm);
1227 /* check for error */
1233 * Increment the endpoint refcount. This
1234 * basically prevents setting a new
1235 * configuration and alternate setting
1236 * when USB transfers are in use on
1237 * the given interface. Search the USB
1238 * code for "endpoint->refcount_alloc" if you
1239 * want more information.
1241 USB_BUS_LOCK(info->bus);
1242 if (xfer->endpoint->refcount_alloc >= USB_EP_REF_MAX)
1243 parm->err = USB_ERR_INVAL;
1245 xfer->endpoint->refcount_alloc++;
1247 if (xfer->endpoint->refcount_alloc == 0)
1248 panic("usbd_transfer_setup(): Refcount wrapped to zero\n");
1249 USB_BUS_UNLOCK(info->bus);
1252 * Whenever we set ppxfer[] then we
1253 * also need to increment the
1256 info->setup_refcount++;
1259 * Transfer is successfully setup and
1265 /* check for error */
1270 if (buf != NULL || parm->err != 0)
1273 /* if no transfers, nothing to do */
1277 /* align data properly */
1278 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1280 /* store offset temporarily */
1281 parm->size[1] = parm->size[0];
1284 * The number of DMA tags required depends on
1285 * the number of endpoints. The current estimate
1286 * for maximum number of DMA tags per endpoint
1288 * 1) for loading memory
1289 * 2) for allocating memory
1290 * 3) for fixing memory [UHCI]
1292 parm->dma_tag_max += 3 * MIN(n_setup, USB_EP_MAX);
1295 * DMA tags for QH, TD, Data and more.
1297 parm->dma_tag_max += 8;
1299 parm->dma_tag_p += parm->dma_tag_max;
1301 parm->size[0] += ((uint8_t *)parm->dma_tag_p) -
1304 /* align data properly */
1305 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1307 /* store offset temporarily */
1308 parm->size[3] = parm->size[0];
1310 parm->size[0] += ((uint8_t *)parm->dma_page_ptr) -
1313 /* align data properly */
1314 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1316 /* store offset temporarily */
1317 parm->size[4] = parm->size[0];
1319 parm->size[0] += ((uint8_t *)parm->dma_page_cache_ptr) -
1322 /* store end offset temporarily */
1323 parm->size[5] = parm->size[0];
1325 parm->size[0] += ((uint8_t *)parm->xfer_page_cache_ptr) -
1328 /* store end offset temporarily */
1330 parm->size[2] = parm->size[0];
1332 /* align data properly */
1333 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1335 parm->size[6] = parm->size[0];
1337 parm->size[0] += ((uint8_t *)parm->xfer_length_ptr) -
1340 /* align data properly */
1341 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1343 /* allocate zeroed memory */
1344 buf = malloc(parm->size[0], M_USB, M_WAITOK | M_ZERO);
1347 parm->err = USB_ERR_NOMEM;
1348 DPRINTFN(0, "cannot allocate memory block for "
1349 "configuration (%d bytes)\n",
1353 parm->dma_tag_p = USB_ADD_BYTES(buf, parm->size[1]);
1354 parm->dma_page_ptr = USB_ADD_BYTES(buf, parm->size[3]);
1355 parm->dma_page_cache_ptr = USB_ADD_BYTES(buf, parm->size[4]);
1356 parm->xfer_page_cache_ptr = USB_ADD_BYTES(buf, parm->size[5]);
1357 parm->xfer_length_ptr = USB_ADD_BYTES(buf, parm->size[6]);
1362 if (info->setup_refcount == 0) {
1364 * "usbd_transfer_unsetup_sub" will unlock
1365 * the bus mutex before returning !
1367 USB_BUS_LOCK(info->bus);
1369 /* something went wrong */
1370 usbd_transfer_unsetup_sub(info, 0);
1374 /* check if any errors happened */
1376 usbd_transfer_unsetup(ppxfer, n_setup);
1381 usbd_ctrl_unlock(udev);
1386 /*------------------------------------------------------------------------*
1387 * usbd_transfer_unsetup_sub - factored out code
1388 *------------------------------------------------------------------------*/
1390 usbd_transfer_unsetup_sub(struct usb_xfer_root *info, uint8_t needs_delay)
1393 struct usb_page_cache *pc;
1396 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED);
1398 /* wait for any outstanding DMA operations */
1402 temp = usbd_get_dma_delay(info->udev);
1404 usb_pause_mtx(&info->bus->bus_mtx,
1405 USB_MS_TO_TICKS(temp));
1409 /* make sure that our done messages are not queued anywhere */
1410 usb_proc_mwait(info->done_p, &info->done_m[0], &info->done_m[1]);
1412 USB_BUS_UNLOCK(info->bus);
1415 /* free DMA'able memory, if any */
1416 pc = info->dma_page_cache_start;
1417 while (pc != info->dma_page_cache_end) {
1418 usb_pc_free_mem(pc);
1422 /* free DMA maps in all "xfer->frbuffers" */
1423 pc = info->xfer_page_cache_start;
1424 while (pc != info->xfer_page_cache_end) {
1425 usb_pc_dmamap_destroy(pc);
1429 /* free all DMA tags */
1430 usb_dma_tag_unsetup(&info->dma_parent_tag);
1433 cv_destroy(&info->cv_drain);
1436 * free the "memory_base" last, hence the "info" structure is
1437 * contained within the "memory_base"!
1439 free(info->memory_base, M_USB);
1442 /*------------------------------------------------------------------------*
1443 * usbd_transfer_unsetup - unsetup/free an array of USB transfers
1445 * NOTE: All USB transfers in progress will get called back passing
1446 * the error code "USB_ERR_CANCELLED" before this function
1448 *------------------------------------------------------------------------*/
1450 usbd_transfer_unsetup(struct usb_xfer **pxfer, uint16_t n_setup)
1452 struct usb_xfer *xfer;
1453 struct usb_xfer_root *info;
1454 uint8_t needs_delay = 0;
1456 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1457 "usbd_transfer_unsetup can sleep!");
1460 xfer = pxfer[n_setup];
1467 USB_XFER_LOCK(xfer);
1468 USB_BUS_LOCK(info->bus);
1471 * HINT: when you start/stop a transfer, it might be a
1472 * good idea to directly use the "pxfer[]" structure:
1474 * usbd_transfer_start(sc->pxfer[0]);
1475 * usbd_transfer_stop(sc->pxfer[0]);
1477 * That way, if your code has many parts that will not
1478 * stop running under the same lock, in other words
1479 * "xfer_mtx", the usbd_transfer_start and
1480 * usbd_transfer_stop functions will simply return
1481 * when they detect a NULL pointer argument.
1483 * To avoid any races we clear the "pxfer[]" pointer
1484 * while holding the private mutex of the driver:
1486 pxfer[n_setup] = NULL;
1488 USB_BUS_UNLOCK(info->bus);
1489 USB_XFER_UNLOCK(xfer);
1491 usbd_transfer_drain(xfer);
1494 if (xfer->flags_int.bdma_enable)
1498 * NOTE: default endpoint does not have an
1499 * interface, even if endpoint->iface_index == 0
1501 USB_BUS_LOCK(info->bus);
1502 xfer->endpoint->refcount_alloc--;
1503 USB_BUS_UNLOCK(info->bus);
1505 usb_callout_drain(&xfer->timeout_handle);
1507 USB_BUS_LOCK(info->bus);
1509 USB_ASSERT(info->setup_refcount != 0, ("Invalid setup "
1510 "reference count\n"));
1512 info->setup_refcount--;
1514 if (info->setup_refcount == 0) {
1515 usbd_transfer_unsetup_sub(info,
1518 USB_BUS_UNLOCK(info->bus);
1523 /*------------------------------------------------------------------------*
1524 * usbd_control_transfer_init - factored out code
1526 * In USB Device Mode we have to wait for the SETUP packet which
1527 * containst the "struct usb_device_request" structure, before we can
1528 * transfer any data. In USB Host Mode we already have the SETUP
1529 * packet at the moment the USB transfer is started. This leads us to
1530 * having to setup the USB transfer at two different places in
1531 * time. This function just contains factored out control transfer
1532 * initialisation code, so that we don't duplicate the code.
1533 *------------------------------------------------------------------------*/
1535 usbd_control_transfer_init(struct usb_xfer *xfer)
1537 struct usb_device_request req;
1539 /* copy out the USB request header */
1541 usbd_copy_out(xfer->frbuffers, 0, &req, sizeof(req));
1543 /* setup remainder */
1545 xfer->flags_int.control_rem = UGETW(req.wLength);
1547 /* copy direction to endpoint variable */
1549 xfer->endpointno &= ~(UE_DIR_IN | UE_DIR_OUT);
1551 (req.bmRequestType & UT_READ) ? UE_DIR_IN : UE_DIR_OUT;
1554 /*------------------------------------------------------------------------*
1555 * usbd_control_transfer_did_data
1557 * This function returns non-zero if a control endpoint has
1558 * transferred the first DATA packet after the SETUP packet.
1559 * Else it returns zero.
1560 *------------------------------------------------------------------------*/
1562 usbd_control_transfer_did_data(struct usb_xfer *xfer)
1564 struct usb_device_request req;
1566 /* SETUP packet is not yet sent */
1567 if (xfer->flags_int.control_hdr != 0)
1570 /* copy out the USB request header */
1571 usbd_copy_out(xfer->frbuffers, 0, &req, sizeof(req));
1573 /* compare remainder to the initial value */
1574 return (xfer->flags_int.control_rem != UGETW(req.wLength));
1577 /*------------------------------------------------------------------------*
1578 * usbd_setup_ctrl_transfer
1580 * This function handles initialisation of control transfers. Control
1581 * transfers are special in that regard that they can both transmit
1587 *------------------------------------------------------------------------*/
1589 usbd_setup_ctrl_transfer(struct usb_xfer *xfer)
1593 /* Check for control endpoint stall */
1594 if (xfer->flags.stall_pipe && xfer->flags_int.control_act) {
1595 /* the control transfer is no longer active */
1596 xfer->flags_int.control_stall = 1;
1597 xfer->flags_int.control_act = 0;
1599 /* don't stall control transfer by default */
1600 xfer->flags_int.control_stall = 0;
1603 /* Check for invalid number of frames */
1604 if (xfer->nframes > 2) {
1606 * If you need to split a control transfer, you
1607 * have to do one part at a time. Only with
1608 * non-control transfers you can do multiple
1611 DPRINTFN(0, "Too many frames: %u\n",
1612 (unsigned int)xfer->nframes);
1617 * Check if there is a control
1618 * transfer in progress:
1620 if (xfer->flags_int.control_act) {
1622 if (xfer->flags_int.control_hdr) {
1624 /* clear send header flag */
1626 xfer->flags_int.control_hdr = 0;
1628 /* setup control transfer */
1629 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
1630 usbd_control_transfer_init(xfer);
1633 /* get data length */
1639 /* the size of the SETUP structure is hardcoded ! */
1641 if (xfer->frlengths[0] != sizeof(struct usb_device_request)) {
1642 DPRINTFN(0, "Wrong framelength %u != %zu\n",
1643 xfer->frlengths[0], sizeof(struct
1644 usb_device_request));
1647 /* check USB mode */
1648 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
1650 /* check number of frames */
1651 if (xfer->nframes != 1) {
1653 * We need to receive the setup
1654 * message first so that we know the
1657 DPRINTF("Misconfigured transfer\n");
1661 * Set a dummy "control_rem" value. This
1662 * variable will be overwritten later by a
1663 * call to "usbd_control_transfer_init()" !
1665 xfer->flags_int.control_rem = 0xFFFF;
1668 /* setup "endpoint" and "control_rem" */
1670 usbd_control_transfer_init(xfer);
1673 /* set transfer-header flag */
1675 xfer->flags_int.control_hdr = 1;
1677 /* get data length */
1679 len = (xfer->sumlen - sizeof(struct usb_device_request));
1682 /* update did data flag */
1684 xfer->flags_int.control_did_data =
1685 usbd_control_transfer_did_data(xfer);
1687 /* check if there is a length mismatch */
1689 if (len > xfer->flags_int.control_rem) {
1690 DPRINTFN(0, "Length (%d) greater than "
1691 "remaining length (%d)\n", len,
1692 xfer->flags_int.control_rem);
1695 /* check if we are doing a short transfer */
1697 if (xfer->flags.force_short_xfer) {
1698 xfer->flags_int.control_rem = 0;
1700 if ((len != xfer->max_data_length) &&
1701 (len != xfer->flags_int.control_rem) &&
1702 (xfer->nframes != 1)) {
1703 DPRINTFN(0, "Short control transfer without "
1704 "force_short_xfer set\n");
1707 xfer->flags_int.control_rem -= len;
1710 /* the status part is executed when "control_act" is 0 */
1712 if ((xfer->flags_int.control_rem > 0) ||
1713 (xfer->flags.manual_status)) {
1714 /* don't execute the STATUS stage yet */
1715 xfer->flags_int.control_act = 1;
1718 if ((!xfer->flags_int.control_hdr) &&
1719 (xfer->nframes == 1)) {
1721 * This is not a valid operation!
1723 DPRINTFN(0, "Invalid parameter "
1728 /* time to execute the STATUS stage */
1729 xfer->flags_int.control_act = 0;
1731 return (0); /* success */
1734 return (1); /* failure */
1737 /*------------------------------------------------------------------------*
1738 * usbd_transfer_submit - start USB hardware for the given transfer
1740 * This function should only be called from the USB callback.
1741 *------------------------------------------------------------------------*/
1743 usbd_transfer_submit(struct usb_xfer *xfer)
1745 struct usb_xfer_root *info;
1746 struct usb_bus *bus;
1752 DPRINTF("xfer=%p, endpoint=%p, nframes=%d, dir=%s\n",
1753 xfer, xfer->endpoint, xfer->nframes, USB_GET_DATA_ISREAD(xfer) ?
1757 if (USB_DEBUG_VAR > 0) {
1760 usb_dump_endpoint(xfer->endpoint);
1762 USB_BUS_UNLOCK(bus);
1766 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1767 USB_BUS_LOCK_ASSERT(bus, MA_NOTOWNED);
1769 /* Only open the USB transfer once! */
1770 if (!xfer->flags_int.open) {
1771 xfer->flags_int.open = 1;
1776 (xfer->endpoint->methods->open) (xfer);
1777 USB_BUS_UNLOCK(bus);
1779 /* set "transferring" flag */
1780 xfer->flags_int.transferring = 1;
1783 /* increment power reference */
1784 usbd_transfer_power_ref(xfer, 1);
1787 * Check if the transfer is waiting on a queue, most
1788 * frequently the "done_q":
1790 if (xfer->wait_queue) {
1792 usbd_transfer_dequeue(xfer);
1793 USB_BUS_UNLOCK(bus);
1795 /* clear "did_dma_delay" flag */
1796 xfer->flags_int.did_dma_delay = 0;
1798 /* clear "did_close" flag */
1799 xfer->flags_int.did_close = 0;
1802 /* clear "bdma_setup" flag */
1803 xfer->flags_int.bdma_setup = 0;
1805 /* by default we cannot cancel any USB transfer immediately */
1806 xfer->flags_int.can_cancel_immed = 0;
1808 /* clear lengths and frame counts by default */
1813 /* clear any previous errors */
1816 /* Check if the device is still alive */
1817 if (info->udev->state < USB_STATE_POWERED) {
1820 * Must return cancelled error code else
1821 * device drivers can hang.
1823 usbd_transfer_done(xfer, USB_ERR_CANCELLED);
1824 USB_BUS_UNLOCK(bus);
1829 if (xfer->nframes == 0) {
1830 if (xfer->flags.stall_pipe) {
1832 * Special case - want to stall without transferring
1835 DPRINTF("xfer=%p nframes=0: stall "
1836 "or clear stall!\n", xfer);
1838 xfer->flags_int.can_cancel_immed = 1;
1839 /* start the transfer */
1840 usb_command_wrapper(&xfer->endpoint->
1841 endpoint_q[xfer->stream_id], xfer);
1842 USB_BUS_UNLOCK(bus);
1846 usbd_transfer_done(xfer, USB_ERR_INVAL);
1847 USB_BUS_UNLOCK(bus);
1850 /* compute some variables */
1852 for (x = 0; x != xfer->nframes; x++) {
1853 /* make a copy of the frlenghts[] */
1854 xfer->frlengths[x + xfer->max_frame_count] = xfer->frlengths[x];
1855 /* compute total transfer length */
1856 xfer->sumlen += xfer->frlengths[x];
1857 if (xfer->sumlen < xfer->frlengths[x]) {
1858 /* length wrapped around */
1860 usbd_transfer_done(xfer, USB_ERR_INVAL);
1861 USB_BUS_UNLOCK(bus);
1866 /* clear some internal flags */
1868 xfer->flags_int.short_xfer_ok = 0;
1869 xfer->flags_int.short_frames_ok = 0;
1871 /* check if this is a control transfer */
1873 if (xfer->flags_int.control_xfr) {
1875 if (usbd_setup_ctrl_transfer(xfer)) {
1877 usbd_transfer_done(xfer, USB_ERR_STALLED);
1878 USB_BUS_UNLOCK(bus);
1883 * Setup filtered version of some transfer flags,
1884 * in case of data read direction
1886 if (USB_GET_DATA_ISREAD(xfer)) {
1888 if (xfer->flags.short_frames_ok) {
1889 xfer->flags_int.short_xfer_ok = 1;
1890 xfer->flags_int.short_frames_ok = 1;
1891 } else if (xfer->flags.short_xfer_ok) {
1892 xfer->flags_int.short_xfer_ok = 1;
1894 /* check for control transfer */
1895 if (xfer->flags_int.control_xfr) {
1897 * 1) Control transfers do not support
1898 * reception of multiple short USB
1899 * frames in host mode and device side
1900 * mode, with exception of:
1902 * 2) Due to sometimes buggy device
1903 * side firmware we need to do a
1904 * STATUS stage in case of short
1905 * control transfers in USB host mode.
1906 * The STATUS stage then becomes the
1907 * "alt_next" to the DATA stage.
1909 xfer->flags_int.short_frames_ok = 1;
1914 * Check if BUS-DMA support is enabled and try to load virtual
1915 * buffers into DMA, if any:
1918 if (xfer->flags_int.bdma_enable) {
1919 /* insert the USB transfer last in the BUS-DMA queue */
1920 usb_command_wrapper(&xfer->xroot->dma_q, xfer);
1925 * Enter the USB transfer into the Host Controller or
1926 * Device Controller schedule:
1928 usbd_pipe_enter(xfer);
1931 /*------------------------------------------------------------------------*
1932 * usbd_pipe_enter - factored out code
1933 *------------------------------------------------------------------------*/
1935 usbd_pipe_enter(struct usb_xfer *xfer)
1937 struct usb_endpoint *ep;
1939 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1941 USB_BUS_LOCK(xfer->xroot->bus);
1943 ep = xfer->endpoint;
1947 /* the transfer can now be cancelled */
1948 xfer->flags_int.can_cancel_immed = 1;
1950 /* enter the transfer */
1951 (ep->methods->enter) (xfer);
1953 /* check for transfer error */
1955 /* some error has happened */
1956 usbd_transfer_done(xfer, 0);
1957 USB_BUS_UNLOCK(xfer->xroot->bus);
1961 /* start the transfer */
1962 usb_command_wrapper(&ep->endpoint_q[xfer->stream_id], xfer);
1963 USB_BUS_UNLOCK(xfer->xroot->bus);
1966 /*------------------------------------------------------------------------*
1967 * usbd_transfer_start - start an USB transfer
1969 * NOTE: Calling this function more than one time will only
1970 * result in a single transfer start, until the USB transfer
1972 *------------------------------------------------------------------------*/
1974 usbd_transfer_start(struct usb_xfer *xfer)
1977 /* transfer is gone */
1980 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1982 /* mark the USB transfer started */
1984 if (!xfer->flags_int.started) {
1985 /* lock the BUS lock to avoid races updating flags_int */
1986 USB_BUS_LOCK(xfer->xroot->bus);
1987 xfer->flags_int.started = 1;
1988 USB_BUS_UNLOCK(xfer->xroot->bus);
1990 /* check if the USB transfer callback is already transferring */
1992 if (xfer->flags_int.transferring) {
1995 USB_BUS_LOCK(xfer->xroot->bus);
1996 /* call the USB transfer callback */
1997 usbd_callback_ss_done_defer(xfer);
1998 USB_BUS_UNLOCK(xfer->xroot->bus);
2001 /*------------------------------------------------------------------------*
2002 * usbd_transfer_stop - stop an USB transfer
2004 * NOTE: Calling this function more than one time will only
2005 * result in a single transfer stop.
2006 * NOTE: When this function returns it is not safe to free nor
2007 * reuse any DMA buffers. See "usbd_transfer_drain()".
2008 *------------------------------------------------------------------------*/
2010 usbd_transfer_stop(struct usb_xfer *xfer)
2012 struct usb_endpoint *ep;
2015 /* transfer is gone */
2018 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
2020 /* check if the USB transfer was ever opened */
2022 if (!xfer->flags_int.open) {
2023 if (xfer->flags_int.started) {
2024 /* nothing to do except clearing the "started" flag */
2025 /* lock the BUS lock to avoid races updating flags_int */
2026 USB_BUS_LOCK(xfer->xroot->bus);
2027 xfer->flags_int.started = 0;
2028 USB_BUS_UNLOCK(xfer->xroot->bus);
2032 /* try to stop the current USB transfer */
2034 USB_BUS_LOCK(xfer->xroot->bus);
2035 /* override any previous error */
2036 xfer->error = USB_ERR_CANCELLED;
2039 * Clear "open" and "started" when both private and USB lock
2040 * is locked so that we don't get a race updating "flags_int"
2042 xfer->flags_int.open = 0;
2043 xfer->flags_int.started = 0;
2046 * Check if we can cancel the USB transfer immediately.
2048 if (xfer->flags_int.transferring) {
2049 if (xfer->flags_int.can_cancel_immed &&
2050 (!xfer->flags_int.did_close)) {
2053 * The following will lead to an USB_ERR_CANCELLED
2054 * error code being passed to the USB callback.
2056 (xfer->endpoint->methods->close) (xfer);
2057 /* only close once */
2058 xfer->flags_int.did_close = 1;
2060 /* need to wait for the next done callback */
2065 /* close here and now */
2066 (xfer->endpoint->methods->close) (xfer);
2069 * Any additional DMA delay is done by
2070 * "usbd_transfer_unsetup()".
2074 * Special case. Check if we need to restart a blocked
2077 ep = xfer->endpoint;
2080 * If the current USB transfer is completing we need
2081 * to start the next one:
2083 if (ep->endpoint_q[xfer->stream_id].curr == xfer) {
2084 usb_command_wrapper(
2085 &ep->endpoint_q[xfer->stream_id], NULL);
2089 USB_BUS_UNLOCK(xfer->xroot->bus);
2092 /*------------------------------------------------------------------------*
2093 * usbd_transfer_pending
2095 * This function will check if an USB transfer is pending which is a
2096 * little bit complicated!
2099 * 1: Pending: The USB transfer will receive a callback in the future.
2100 *------------------------------------------------------------------------*/
2102 usbd_transfer_pending(struct usb_xfer *xfer)
2104 struct usb_xfer_root *info;
2105 struct usb_xfer_queue *pq;
2108 /* transfer is gone */
2111 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
2113 if (xfer->flags_int.transferring) {
2117 USB_BUS_LOCK(xfer->xroot->bus);
2118 if (xfer->wait_queue) {
2119 /* we are waiting on a queue somewhere */
2120 USB_BUS_UNLOCK(xfer->xroot->bus);
2126 if (pq->curr == xfer) {
2127 /* we are currently scheduled for callback */
2128 USB_BUS_UNLOCK(xfer->xroot->bus);
2131 /* we are not pending */
2132 USB_BUS_UNLOCK(xfer->xroot->bus);
2136 /*------------------------------------------------------------------------*
2137 * usbd_transfer_drain
2139 * This function will stop the USB transfer and wait for any
2140 * additional BUS-DMA and HW-DMA operations to complete. Buffers that
2141 * are loaded into DMA can safely be freed or reused after that this
2142 * function has returned.
2143 *------------------------------------------------------------------------*/
2145 usbd_transfer_drain(struct usb_xfer *xfer)
2147 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
2148 "usbd_transfer_drain can sleep!");
2151 /* transfer is gone */
2154 if (xfer->xroot->xfer_mtx != &Giant) {
2155 USB_XFER_LOCK_ASSERT(xfer, MA_NOTOWNED);
2157 USB_XFER_LOCK(xfer);
2159 usbd_transfer_stop(xfer);
2161 while (usbd_transfer_pending(xfer) ||
2162 xfer->flags_int.doing_callback) {
2165 * It is allowed that the callback can drop its
2166 * transfer mutex. In that case checking only
2167 * "usbd_transfer_pending()" is not enough to tell if
2168 * the USB transfer is fully drained. We also need to
2169 * check the internal "doing_callback" flag.
2171 xfer->flags_int.draining = 1;
2174 * Wait until the current outstanding USB
2175 * transfer is complete !
2177 cv_wait(&xfer->xroot->cv_drain, xfer->xroot->xfer_mtx);
2179 USB_XFER_UNLOCK(xfer);
2182 struct usb_page_cache *
2183 usbd_xfer_get_frame(struct usb_xfer *xfer, usb_frcount_t frindex)
2185 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2187 return (&xfer->frbuffers[frindex]);
2191 usbd_xfer_get_frame_buffer(struct usb_xfer *xfer, usb_frcount_t frindex)
2193 struct usb_page_search page_info;
2195 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2197 usbd_get_page(&xfer->frbuffers[frindex], 0, &page_info);
2198 return (page_info.buffer);
2201 /*------------------------------------------------------------------------*
2202 * usbd_xfer_get_fps_shift
2204 * The following function is only useful for isochronous transfers. It
2205 * returns how many times the frame execution rate has been shifted
2211 *------------------------------------------------------------------------*/
2213 usbd_xfer_get_fps_shift(struct usb_xfer *xfer)
2215 return (xfer->fps_shift);
2219 usbd_xfer_frame_len(struct usb_xfer *xfer, usb_frcount_t frindex)
2221 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2223 return (xfer->frlengths[frindex]);
2226 /*------------------------------------------------------------------------*
2227 * usbd_xfer_set_frame_data
2229 * This function sets the pointer of the buffer that should
2230 * loaded directly into DMA for the given USB frame. Passing "ptr"
2231 * equal to NULL while the corresponding "frlength" is greater
2232 * than zero gives undefined results!
2233 *------------------------------------------------------------------------*/
2235 usbd_xfer_set_frame_data(struct usb_xfer *xfer, usb_frcount_t frindex,
2236 void *ptr, usb_frlength_t len)
2238 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2240 /* set virtual address to load and length */
2241 xfer->frbuffers[frindex].buffer = ptr;
2242 usbd_xfer_set_frame_len(xfer, frindex, len);
2246 usbd_xfer_frame_data(struct usb_xfer *xfer, usb_frcount_t frindex,
2247 void **ptr, int *len)
2249 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2252 *ptr = xfer->frbuffers[frindex].buffer;
2254 *len = xfer->frlengths[frindex];
2257 /*------------------------------------------------------------------------*
2258 * usbd_xfer_old_frame_length
2260 * This function returns the framelength of the given frame at the
2261 * time the transfer was submitted. This function can be used to
2262 * compute the starting data pointer of the next isochronous frame
2263 * when an isochronous transfer has completed.
2264 *------------------------------------------------------------------------*/
2266 usbd_xfer_old_frame_length(struct usb_xfer *xfer, usb_frcount_t frindex)
2268 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2270 return (xfer->frlengths[frindex + xfer->max_frame_count]);
2274 usbd_xfer_status(struct usb_xfer *xfer, int *actlen, int *sumlen, int *aframes,
2278 *actlen = xfer->actlen;
2280 *sumlen = xfer->sumlen;
2281 if (aframes != NULL)
2282 *aframes = xfer->aframes;
2283 if (nframes != NULL)
2284 *nframes = xfer->nframes;
2287 /*------------------------------------------------------------------------*
2288 * usbd_xfer_set_frame_offset
2290 * This function sets the frame data buffer offset relative to the beginning
2291 * of the USB DMA buffer allocated for this USB transfer.
2292 *------------------------------------------------------------------------*/
2294 usbd_xfer_set_frame_offset(struct usb_xfer *xfer, usb_frlength_t offset,
2295 usb_frcount_t frindex)
2297 KASSERT(!xfer->flags.ext_buffer, ("Cannot offset data frame "
2298 "when the USB buffer is external\n"));
2299 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2301 /* set virtual address to load */
2302 xfer->frbuffers[frindex].buffer =
2303 USB_ADD_BYTES(xfer->local_buffer, offset);
2307 usbd_xfer_set_interval(struct usb_xfer *xfer, int i)
2313 usbd_xfer_set_timeout(struct usb_xfer *xfer, int t)
2319 usbd_xfer_set_frames(struct usb_xfer *xfer, usb_frcount_t n)
2325 usbd_xfer_max_frames(struct usb_xfer *xfer)
2327 return (xfer->max_frame_count);
2331 usbd_xfer_max_len(struct usb_xfer *xfer)
2333 return (xfer->max_data_length);
2337 usbd_xfer_max_framelen(struct usb_xfer *xfer)
2339 return (xfer->max_frame_size);
2343 usbd_xfer_set_frame_len(struct usb_xfer *xfer, usb_frcount_t frindex,
2346 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2348 xfer->frlengths[frindex] = len;
2351 /*------------------------------------------------------------------------*
2352 * usb_callback_proc - factored out code
2354 * This function performs USB callbacks.
2355 *------------------------------------------------------------------------*/
2357 usb_callback_proc(struct usb_proc_msg *_pm)
2359 struct usb_done_msg *pm = (void *)_pm;
2360 struct usb_xfer_root *info = pm->xroot;
2362 /* Change locking order */
2363 USB_BUS_UNLOCK(info->bus);
2366 * We exploit the fact that the mutex is the same for all
2367 * callbacks that will be called from this thread:
2369 USB_MTX_LOCK(info->xfer_mtx);
2370 USB_BUS_LOCK(info->bus);
2372 /* Continue where we lost track */
2373 usb_command_wrapper(&info->done_q,
2376 USB_MTX_UNLOCK(info->xfer_mtx);
2379 /*------------------------------------------------------------------------*
2380 * usbd_callback_ss_done_defer
2382 * This function will defer the start, stop and done callback to the
2384 *------------------------------------------------------------------------*/
2386 usbd_callback_ss_done_defer(struct usb_xfer *xfer)
2388 struct usb_xfer_root *info = xfer->xroot;
2389 struct usb_xfer_queue *pq = &info->done_q;
2391 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2393 if (pq->curr != xfer) {
2394 usbd_transfer_enqueue(pq, xfer);
2396 if (!pq->recurse_1) {
2399 * We have to postpone the callback due to the fact we
2400 * will have a Lock Order Reversal, LOR, if we try to
2403 (void) usb_proc_msignal(info->done_p,
2404 &info->done_m[0], &info->done_m[1]);
2406 /* clear second recurse flag */
2413 /*------------------------------------------------------------------------*
2414 * usbd_callback_wrapper
2416 * This is a wrapper for USB callbacks. This wrapper does some
2417 * auto-magic things like figuring out if we can call the callback
2418 * directly from the current context or if we need to wakeup the
2419 * interrupt process.
2420 *------------------------------------------------------------------------*/
2422 usbd_callback_wrapper(struct usb_xfer_queue *pq)
2424 struct usb_xfer *xfer = pq->curr;
2425 struct usb_xfer_root *info = xfer->xroot;
2427 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED);
2428 if ((pq->recurse_3 != 0 || mtx_owned(info->xfer_mtx) == 0) &&
2429 USB_IN_POLLING_MODE_FUNC() == 0) {
2431 * Cases that end up here:
2433 * 5) HW interrupt done callback or other source.
2434 * 6) HW completed transfer during callback
2436 DPRINTFN(3, "case 5 and 6\n");
2439 * We have to postpone the callback due to the fact we
2440 * will have a Lock Order Reversal, LOR, if we try to
2443 * Postponing the callback also ensures that other USB
2444 * transfer queues get a chance.
2446 (void) usb_proc_msignal(info->done_p,
2447 &info->done_m[0], &info->done_m[1]);
2451 * Cases that end up here:
2453 * 1) We are starting a transfer
2454 * 2) We are prematurely calling back a transfer
2455 * 3) We are stopping a transfer
2456 * 4) We are doing an ordinary callback
2458 DPRINTFN(3, "case 1-4\n");
2459 /* get next USB transfer in the queue */
2460 info->done_q.curr = NULL;
2462 /* set flag in case of drain */
2463 xfer->flags_int.doing_callback = 1;
2465 USB_BUS_UNLOCK(info->bus);
2466 USB_BUS_LOCK_ASSERT(info->bus, MA_NOTOWNED);
2468 /* set correct USB state for callback */
2469 if (!xfer->flags_int.transferring) {
2470 xfer->usb_state = USB_ST_SETUP;
2471 if (!xfer->flags_int.started) {
2472 /* we got stopped before we even got started */
2473 USB_BUS_LOCK(info->bus);
2478 if (usbd_callback_wrapper_sub(xfer)) {
2479 /* the callback has been deferred */
2480 USB_BUS_LOCK(info->bus);
2484 /* decrement power reference */
2485 usbd_transfer_power_ref(xfer, -1);
2487 xfer->flags_int.transferring = 0;
2490 xfer->usb_state = USB_ST_ERROR;
2492 /* set transferred state */
2493 xfer->usb_state = USB_ST_TRANSFERRED;
2495 /* sync DMA memory, if any */
2496 if (xfer->flags_int.bdma_enable &&
2497 (!xfer->flags_int.bdma_no_post_sync)) {
2498 usb_bdma_post_sync(xfer);
2505 if (xfer->usb_state != USB_ST_SETUP) {
2506 USB_BUS_LOCK(info->bus);
2507 usbpf_xfertap(xfer, USBPF_XFERTAP_DONE);
2508 USB_BUS_UNLOCK(info->bus);
2511 /* call processing routine */
2512 (xfer->callback) (xfer, xfer->error);
2514 /* pickup the USB mutex again */
2515 USB_BUS_LOCK(info->bus);
2518 * Check if we got started after that we got cancelled, but
2519 * before we managed to do the callback.
2521 if ((!xfer->flags_int.open) &&
2522 (xfer->flags_int.started) &&
2523 (xfer->usb_state == USB_ST_ERROR)) {
2524 /* clear flag in case of drain */
2525 xfer->flags_int.doing_callback = 0;
2526 /* try to loop, but not recursivly */
2527 usb_command_wrapper(&info->done_q, xfer);
2532 /* clear flag in case of drain */
2533 xfer->flags_int.doing_callback = 0;
2536 * Check if we are draining.
2538 if (xfer->flags_int.draining &&
2539 (!xfer->flags_int.transferring)) {
2540 /* "usbd_transfer_drain()" is waiting for end of transfer */
2541 xfer->flags_int.draining = 0;
2542 cv_broadcast(&info->cv_drain);
2545 /* do the next callback, if any */
2546 usb_command_wrapper(&info->done_q,
2550 /*------------------------------------------------------------------------*
2551 * usb_dma_delay_done_cb
2553 * This function is called when the DMA delay has been exectuded, and
2554 * will make sure that the callback is called to complete the USB
2555 * transfer. This code path is usually only used when there is an USB
2556 * error like USB_ERR_CANCELLED.
2557 *------------------------------------------------------------------------*/
2559 usb_dma_delay_done_cb(struct usb_xfer *xfer)
2561 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2563 DPRINTFN(3, "Completed %p\n", xfer);
2565 /* queue callback for execution, again */
2566 usbd_transfer_done(xfer, 0);
2569 /*------------------------------------------------------------------------*
2570 * usbd_transfer_dequeue
2572 * - This function is used to remove an USB transfer from a USB
2575 * - This function can be called multiple times in a row.
2576 *------------------------------------------------------------------------*/
2578 usbd_transfer_dequeue(struct usb_xfer *xfer)
2580 struct usb_xfer_queue *pq;
2582 pq = xfer->wait_queue;
2584 TAILQ_REMOVE(&pq->head, xfer, wait_entry);
2585 xfer->wait_queue = NULL;
2589 /*------------------------------------------------------------------------*
2590 * usbd_transfer_enqueue
2592 * - This function is used to insert an USB transfer into a USB *
2595 * - This function can be called multiple times in a row.
2596 *------------------------------------------------------------------------*/
2598 usbd_transfer_enqueue(struct usb_xfer_queue *pq, struct usb_xfer *xfer)
2601 * Insert the USB transfer into the queue, if it is not
2602 * already on a USB transfer queue:
2604 if (xfer->wait_queue == NULL) {
2605 xfer->wait_queue = pq;
2606 TAILQ_INSERT_TAIL(&pq->head, xfer, wait_entry);
2610 /*------------------------------------------------------------------------*
2611 * usbd_transfer_done
2613 * - This function is used to remove an USB transfer from the busdma,
2614 * pipe or interrupt queue.
2616 * - This function is used to queue the USB transfer on the done
2619 * - This function is used to stop any USB transfer timeouts.
2620 *------------------------------------------------------------------------*/
2622 usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error)
2624 struct usb_xfer_root *info = xfer->xroot;
2626 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED);
2628 DPRINTF("err=%s\n", usbd_errstr(error));
2631 * If we are not transferring then just return.
2632 * This can happen during transfer cancel.
2634 if (!xfer->flags_int.transferring) {
2635 DPRINTF("not transferring\n");
2636 /* end of control transfer, if any */
2637 xfer->flags_int.control_act = 0;
2640 /* only set transfer error, if not already set */
2641 if (xfer->error == USB_ERR_NORMAL_COMPLETION)
2642 xfer->error = error;
2644 /* stop any callouts */
2645 usb_callout_stop(&xfer->timeout_handle);
2648 * If we are waiting on a queue, just remove the USB transfer
2649 * from the queue, if any. We should have the required locks
2650 * locked to do the remove when this function is called.
2652 usbd_transfer_dequeue(xfer);
2655 if (mtx_owned(info->xfer_mtx)) {
2656 struct usb_xfer_queue *pq;
2659 * If the private USB lock is not locked, then we assume
2660 * that the BUS-DMA load stage has been passed:
2664 if (pq->curr == xfer) {
2665 /* start the next BUS-DMA load, if any */
2666 usb_command_wrapper(pq, NULL);
2670 /* keep some statistics */
2671 if (xfer->error == USB_ERR_CANCELLED) {
2672 info->udev->stats_cancelled.uds_requests
2673 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++;
2674 } else if (xfer->error != USB_ERR_NORMAL_COMPLETION) {
2675 info->udev->stats_err.uds_requests
2676 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++;
2678 info->udev->stats_ok.uds_requests
2679 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++;
2682 /* call the USB transfer callback */
2683 usbd_callback_ss_done_defer(xfer);
2686 /*------------------------------------------------------------------------*
2687 * usbd_transfer_start_cb
2689 * This function is called to start the USB transfer when
2690 * "xfer->interval" is greater than zero, and and the endpoint type is
2692 *------------------------------------------------------------------------*/
2694 usbd_transfer_start_cb(void *arg)
2696 struct usb_xfer *xfer = arg;
2697 struct usb_endpoint *ep = xfer->endpoint;
2699 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2704 usbpf_xfertap(xfer, USBPF_XFERTAP_SUBMIT);
2707 /* the transfer can now be cancelled */
2708 xfer->flags_int.can_cancel_immed = 1;
2710 /* start USB transfer, if no error */
2711 if (xfer->error == 0)
2712 (ep->methods->start) (xfer);
2714 /* check for transfer error */
2716 /* some error has happened */
2717 usbd_transfer_done(xfer, 0);
2721 /*------------------------------------------------------------------------*
2722 * usbd_xfer_set_stall
2724 * This function is used to set the stall flag outside the
2725 * callback. This function is NULL safe.
2726 *------------------------------------------------------------------------*/
2728 usbd_xfer_set_stall(struct usb_xfer *xfer)
2734 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
2736 /* avoid any races by locking the USB mutex */
2737 USB_BUS_LOCK(xfer->xroot->bus);
2738 xfer->flags.stall_pipe = 1;
2739 USB_BUS_UNLOCK(xfer->xroot->bus);
2743 usbd_xfer_is_stalled(struct usb_xfer *xfer)
2745 return (xfer->endpoint->is_stalled);
2748 /*------------------------------------------------------------------------*
2749 * usbd_transfer_clear_stall
2751 * This function is used to clear the stall flag outside the
2752 * callback. This function is NULL safe.
2753 *------------------------------------------------------------------------*/
2755 usbd_transfer_clear_stall(struct usb_xfer *xfer)
2761 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
2763 /* avoid any races by locking the USB mutex */
2764 USB_BUS_LOCK(xfer->xroot->bus);
2766 xfer->flags.stall_pipe = 0;
2768 USB_BUS_UNLOCK(xfer->xroot->bus);
2771 /*------------------------------------------------------------------------*
2774 * This function is used to add an USB transfer to the pipe transfer list.
2775 *------------------------------------------------------------------------*/
2777 usbd_pipe_start(struct usb_xfer_queue *pq)
2779 struct usb_endpoint *ep;
2780 struct usb_xfer *xfer;
2784 ep = xfer->endpoint;
2786 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2789 * If the endpoint is already stalled we do nothing !
2791 if (ep->is_stalled) {
2795 * Check if we are supposed to stall the endpoint:
2797 if (xfer->flags.stall_pipe) {
2798 struct usb_device *udev;
2799 struct usb_xfer_root *info;
2801 /* clear stall command */
2802 xfer->flags.stall_pipe = 0;
2804 /* get pointer to USB device */
2809 * Only stall BULK and INTERRUPT endpoints.
2811 type = (ep->edesc->bmAttributes & UE_XFERTYPE);
2812 if ((type == UE_BULK) ||
2813 (type == UE_INTERRUPT)) {
2818 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2819 (udev->bus->methods->set_stall) (
2820 udev, ep, &did_stall);
2821 } else if (udev->ctrl_xfer[1]) {
2822 info = udev->ctrl_xfer[1]->xroot;
2824 USB_BUS_CS_PROC(info->bus),
2825 &udev->cs_msg[0], &udev->cs_msg[1]);
2827 /* should not happen */
2828 DPRINTFN(0, "No stall handler\n");
2831 * Check if we should stall. Some USB hardware
2832 * handles set- and clear-stall in hardware.
2836 * The transfer will be continued when
2837 * the clear-stall control endpoint
2838 * message is received.
2843 } else if (type == UE_ISOCHRONOUS) {
2846 * Make sure any FIFO overflow or other FIFO
2847 * error conditions go away by resetting the
2848 * endpoint FIFO through the clear stall
2851 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2852 (udev->bus->methods->clear_stall) (udev, ep);
2856 /* Set or clear stall complete - special case */
2857 if (xfer->nframes == 0) {
2858 /* we are complete */
2860 usbd_transfer_done(xfer, 0);
2866 * 1) Start the first transfer queued.
2868 * 2) Re-start the current USB transfer.
2871 * Check if there should be any
2872 * pre transfer start delay:
2874 if (xfer->interval > 0) {
2875 type = (ep->edesc->bmAttributes & UE_XFERTYPE);
2876 if ((type == UE_BULK) ||
2877 (type == UE_CONTROL)) {
2878 usbd_transfer_timeout_ms(xfer,
2879 &usbd_transfer_start_cb,
2887 usbpf_xfertap(xfer, USBPF_XFERTAP_SUBMIT);
2889 /* the transfer can now be cancelled */
2890 xfer->flags_int.can_cancel_immed = 1;
2892 /* start USB transfer, if no error */
2893 if (xfer->error == 0)
2894 (ep->methods->start) (xfer);
2896 /* check for transfer error */
2898 /* some error has happened */
2899 usbd_transfer_done(xfer, 0);
2903 /*------------------------------------------------------------------------*
2904 * usbd_transfer_timeout_ms
2906 * This function is used to setup a timeout on the given USB
2907 * transfer. If the timeout has been deferred the callback given by
2908 * "cb" will get called after "ms" milliseconds.
2909 *------------------------------------------------------------------------*/
2911 usbd_transfer_timeout_ms(struct usb_xfer *xfer,
2912 void (*cb) (void *arg), usb_timeout_t ms)
2914 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2917 usb_callout_reset(&xfer->timeout_handle,
2918 USB_MS_TO_TICKS(ms) + USB_CALLOUT_ZERO_TICKS, cb, xfer);
2921 /*------------------------------------------------------------------------*
2922 * usbd_callback_wrapper_sub
2924 * - This function will update variables in an USB transfer after
2925 * that the USB transfer is complete.
2927 * - This function is used to start the next USB transfer on the
2928 * ep transfer queue, if any.
2930 * NOTE: In some special cases the USB transfer will not be removed from
2931 * the pipe queue, but remain first. To enforce USB transfer removal call
2932 * this function passing the error code "USB_ERR_CANCELLED".
2936 * Else: The callback has been deferred.
2937 *------------------------------------------------------------------------*/
2939 usbd_callback_wrapper_sub(struct usb_xfer *xfer)
2941 struct usb_endpoint *ep;
2942 struct usb_bus *bus;
2945 bus = xfer->xroot->bus;
2947 if ((!xfer->flags_int.open) &&
2948 (!xfer->flags_int.did_close)) {
2951 (xfer->endpoint->methods->close) (xfer);
2952 USB_BUS_UNLOCK(bus);
2953 /* only close once */
2954 xfer->flags_int.did_close = 1;
2955 return (1); /* wait for new callback */
2958 * If we have a non-hardware induced error we
2959 * need to do the DMA delay!
2961 if (xfer->error != 0 && !xfer->flags_int.did_dma_delay &&
2962 (xfer->error == USB_ERR_CANCELLED ||
2963 xfer->error == USB_ERR_TIMEOUT ||
2964 bus->methods->start_dma_delay != NULL)) {
2968 /* only delay once */
2969 xfer->flags_int.did_dma_delay = 1;
2971 /* we can not cancel this delay */
2972 xfer->flags_int.can_cancel_immed = 0;
2974 temp = usbd_get_dma_delay(xfer->xroot->udev);
2976 DPRINTFN(3, "DMA delay, %u ms, "
2977 "on %p\n", temp, xfer);
2982 * Some hardware solutions have dedicated
2983 * events when it is safe to free DMA'ed
2984 * memory. For the other hardware platforms we
2985 * use a static delay.
2987 if (bus->methods->start_dma_delay != NULL) {
2988 (bus->methods->start_dma_delay) (xfer);
2990 usbd_transfer_timeout_ms(xfer,
2991 (void (*)(void *))&usb_dma_delay_done_cb,
2994 USB_BUS_UNLOCK(bus);
2995 return (1); /* wait for new callback */
2998 /* check actual number of frames */
2999 if (xfer->aframes > xfer->nframes) {
3000 if (xfer->error == 0) {
3001 panic("%s: actual number of frames, %d, is "
3002 "greater than initial number of frames, %d\n",
3003 __FUNCTION__, xfer->aframes, xfer->nframes);
3005 /* just set some valid value */
3006 xfer->aframes = xfer->nframes;
3009 /* compute actual length */
3012 for (x = 0; x != xfer->aframes; x++) {
3013 xfer->actlen += xfer->frlengths[x];
3017 * Frames that were not transferred get zero actual length in
3018 * case the USB device driver does not check the actual number
3019 * of frames transferred, "xfer->aframes":
3021 for (; x < xfer->nframes; x++) {
3022 usbd_xfer_set_frame_len(xfer, x, 0);
3025 /* check actual length */
3026 if (xfer->actlen > xfer->sumlen) {
3027 if (xfer->error == 0) {
3028 panic("%s: actual length, %d, is greater than "
3029 "initial length, %d\n",
3030 __FUNCTION__, xfer->actlen, xfer->sumlen);
3032 /* just set some valid value */
3033 xfer->actlen = xfer->sumlen;
3036 DPRINTFN(1, "xfer=%p endpoint=%p sts=%d alen=%d, slen=%d, afrm=%d, nfrm=%d\n",
3037 xfer, xfer->endpoint, xfer->error, xfer->actlen, xfer->sumlen,
3038 xfer->aframes, xfer->nframes);
3041 /* end of control transfer, if any */
3042 xfer->flags_int.control_act = 0;
3044 #if USB_HAVE_TT_SUPPORT
3045 switch (xfer->error) {
3046 case USB_ERR_NORMAL_COMPLETION:
3047 case USB_ERR_SHORT_XFER:
3048 case USB_ERR_STALLED:
3049 case USB_ERR_CANCELLED:
3053 /* try to reset the TT, if any */
3055 uhub_tt_buffer_reset_async_locked(xfer->xroot->udev, xfer->endpoint);
3056 USB_BUS_UNLOCK(bus);
3060 /* check if we should block the execution queue */
3061 if ((xfer->error != USB_ERR_CANCELLED) &&
3062 (xfer->flags.pipe_bof)) {
3063 DPRINTFN(2, "xfer=%p: Block On Failure "
3064 "on endpoint=%p\n", xfer, xfer->endpoint);
3068 /* check for short transfers */
3069 if (xfer->actlen < xfer->sumlen) {
3071 /* end of control transfer, if any */
3072 xfer->flags_int.control_act = 0;
3074 if (!xfer->flags_int.short_xfer_ok) {
3075 xfer->error = USB_ERR_SHORT_XFER;
3076 if (xfer->flags.pipe_bof) {
3077 DPRINTFN(2, "xfer=%p: Block On Failure on "
3078 "Short Transfer on endpoint %p.\n",
3079 xfer, xfer->endpoint);
3085 * Check if we are in the middle of a
3088 if (xfer->flags_int.control_act) {
3089 DPRINTFN(5, "xfer=%p: Control transfer "
3090 "active on endpoint=%p\n", xfer, xfer->endpoint);
3096 ep = xfer->endpoint;
3099 * If the current USB transfer is completing we need to start the
3103 if (ep->endpoint_q[xfer->stream_id].curr == xfer) {
3104 usb_command_wrapper(&ep->endpoint_q[xfer->stream_id], NULL);
3106 if (ep->endpoint_q[xfer->stream_id].curr != NULL ||
3107 TAILQ_FIRST(&ep->endpoint_q[xfer->stream_id].head) != NULL) {
3108 /* there is another USB transfer waiting */
3110 /* this is the last USB transfer */
3111 /* clear isochronous sync flag */
3112 xfer->endpoint->is_synced = 0;
3115 USB_BUS_UNLOCK(bus);
3120 /*------------------------------------------------------------------------*
3121 * usb_command_wrapper
3123 * This function is used to execute commands non-recursivly on an USB
3125 *------------------------------------------------------------------------*/
3127 usb_command_wrapper(struct usb_xfer_queue *pq, struct usb_xfer *xfer)
3131 * If the transfer is not already processing,
3134 if (pq->curr != xfer) {
3135 usbd_transfer_enqueue(pq, xfer);
3136 if (pq->curr != NULL) {
3137 /* something is already processing */
3138 DPRINTFN(6, "busy %p\n", pq->curr);
3143 /* Get next element in queue */
3147 if (!pq->recurse_1) {
3149 /* clear third recurse flag */
3153 /* set two first recurse flags */
3157 if (pq->curr == NULL) {
3158 xfer = TAILQ_FIRST(&pq->head);
3160 TAILQ_REMOVE(&pq->head, xfer,
3162 xfer->wait_queue = NULL;
3168 DPRINTFN(6, "cb %p (enter)\n", pq->curr);
3170 DPRINTFN(6, "cb %p (leave)\n", pq->curr);
3173 * Set third recurse flag to indicate
3174 * recursion happened:
3178 } while (!pq->recurse_2);
3180 /* clear first recurse flag */
3184 /* clear second recurse flag */
3189 /*------------------------------------------------------------------------*
3190 * usbd_ctrl_transfer_setup
3192 * This function is used to setup the default USB control endpoint
3194 *------------------------------------------------------------------------*/
3196 usbd_ctrl_transfer_setup(struct usb_device *udev)
3198 struct usb_xfer *xfer;
3200 uint8_t iface_index;
3202 /* check for root HUB */
3203 if (udev->parent_hub == NULL)
3207 xfer = udev->ctrl_xfer[0];
3209 USB_XFER_LOCK(xfer);
3211 ((xfer->address == udev->address) &&
3212 (udev->ctrl_ep_desc.wMaxPacketSize[0] ==
3213 udev->ddesc.bMaxPacketSize));
3214 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
3217 * NOTE: checking "xfer->address" and
3218 * starting the USB transfer must be
3221 usbd_transfer_start(xfer);
3224 USB_XFER_UNLOCK(xfer);
3231 * All parameters are exactly the same like before.
3237 * Update wMaxPacketSize for the default control endpoint:
3239 udev->ctrl_ep_desc.wMaxPacketSize[0] =
3240 udev->ddesc.bMaxPacketSize;
3243 * Unsetup any existing USB transfer:
3245 usbd_transfer_unsetup(udev->ctrl_xfer, USB_CTRL_XFER_MAX);
3248 * Reset clear stall error counter.
3250 udev->clear_stall_errors = 0;
3253 * Try to setup a new USB transfer for the
3254 * default control endpoint:
3257 if (usbd_transfer_setup(udev, &iface_index,
3258 udev->ctrl_xfer, udev->bus->control_ep_quirk ?
3259 usb_control_ep_quirk_cfg : usb_control_ep_cfg, USB_CTRL_XFER_MAX, NULL,
3260 &udev->device_mtx)) {
3261 DPRINTFN(0, "could not setup default "
3268 /*------------------------------------------------------------------------*
3269 * usbd_clear_data_toggle - factored out code
3271 * NOTE: the intention of this function is not to reset the hardware
3273 *------------------------------------------------------------------------*/
3275 usbd_clear_stall_locked(struct usb_device *udev, struct usb_endpoint *ep)
3277 USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
3279 /* check that we have a valid case */
3280 if (udev->flags.usb_mode == USB_MODE_HOST &&
3281 udev->parent_hub != NULL &&
3282 udev->bus->methods->clear_stall != NULL &&
3283 ep->methods != NULL) {
3284 (udev->bus->methods->clear_stall) (udev, ep);
3288 /*------------------------------------------------------------------------*
3289 * usbd_clear_data_toggle - factored out code
3291 * NOTE: the intention of this function is not to reset the hardware
3292 * data toggle on the USB device side.
3293 *------------------------------------------------------------------------*/
3295 usbd_clear_data_toggle(struct usb_device *udev, struct usb_endpoint *ep)
3297 DPRINTFN(5, "udev=%p endpoint=%p\n", udev, ep);
3299 USB_BUS_LOCK(udev->bus);
3300 ep->toggle_next = 0;
3301 /* some hardware needs a callback to clear the data toggle */
3302 usbd_clear_stall_locked(udev, ep);
3303 USB_BUS_UNLOCK(udev->bus);
3306 /*------------------------------------------------------------------------*
3307 * usbd_clear_stall_callback - factored out clear stall callback
3310 * xfer1: Clear Stall Control Transfer
3311 * xfer2: Stalled USB Transfer
3313 * This function is NULL safe.
3319 * Clear stall config example:
3321 * static const struct usb_config my_clearstall = {
3322 * .type = UE_CONTROL,
3324 * .direction = UE_DIR_ANY,
3325 * .interval = 50, //50 milliseconds
3326 * .bufsize = sizeof(struct usb_device_request),
3327 * .timeout = 1000, //1.000 seconds
3328 * .callback = &my_clear_stall_callback, // **
3329 * .usb_mode = USB_MODE_HOST,
3332 * ** "my_clear_stall_callback" calls "usbd_clear_stall_callback"
3333 * passing the correct parameters.
3334 *------------------------------------------------------------------------*/
3336 usbd_clear_stall_callback(struct usb_xfer *xfer1,
3337 struct usb_xfer *xfer2)
3339 struct usb_device_request req;
3341 if (xfer2 == NULL) {
3342 /* looks like we are tearing down */
3343 DPRINTF("NULL input parameter\n");
3346 USB_XFER_LOCK_ASSERT(xfer1, MA_OWNED);
3347 USB_XFER_LOCK_ASSERT(xfer2, MA_OWNED);
3349 switch (USB_GET_STATE(xfer1)) {
3353 * pre-clear the data toggle to DATA0 ("umass.c" and
3354 * "ata-usb.c" depends on this)
3357 usbd_clear_data_toggle(xfer2->xroot->udev, xfer2->endpoint);
3359 /* setup a clear-stall packet */
3361 req.bmRequestType = UT_WRITE_ENDPOINT;
3362 req.bRequest = UR_CLEAR_FEATURE;
3363 USETW(req.wValue, UF_ENDPOINT_HALT);
3364 req.wIndex[0] = xfer2->endpoint->edesc->bEndpointAddress;
3366 USETW(req.wLength, 0);
3369 * "usbd_transfer_setup_sub()" will ensure that
3370 * we have sufficient room in the buffer for
3371 * the request structure!
3374 /* copy in the transfer */
3376 usbd_copy_in(xfer1->frbuffers, 0, &req, sizeof(req));
3379 xfer1->frlengths[0] = sizeof(req);
3382 usbd_transfer_submit(xfer1);
3385 case USB_ST_TRANSFERRED:
3388 default: /* Error */
3389 if (xfer1->error == USB_ERR_CANCELLED) {
3394 return (1); /* Clear Stall Finished */
3397 /*------------------------------------------------------------------------*
3398 * usbd_transfer_poll
3400 * The following function gets called from the USB keyboard driver and
3401 * UMASS when the system has paniced.
3403 * NOTE: It is currently not possible to resume normal operation on
3404 * the USB controller which has been polled, due to clearing of the
3405 * "up_dsleep" and "up_msleep" flags.
3406 *------------------------------------------------------------------------*/
3408 usbd_transfer_poll(struct usb_xfer **ppxfer, uint16_t max)
3410 struct usb_xfer *xfer;
3411 struct usb_xfer_root *xroot;
3412 struct usb_device *udev;
3413 struct usb_proc_msg *pm;
3414 struct usb_bus *bus;
3416 uint16_t drop_bus_spin;
3420 for (n = 0; n != max; n++) {
3421 /* Extra checks to avoid panic */
3424 continue; /* no USB transfer */
3425 xroot = xfer->xroot;
3427 continue; /* no USB root */
3430 continue; /* no USB device */
3433 continue; /* no BUS structure */
3434 if (bus->methods == NULL)
3435 continue; /* no BUS methods */
3436 if (bus->methods->xfer_poll == NULL)
3437 continue; /* no poll method */
3443 if (USB_IN_POLLING_MODE_FUNC() == 0) {
3444 /* make sure that the BUS spin mutex is not locked */
3445 while (mtx_owned(&bus->bus_spin_lock)) {
3446 mtx_unlock_spin(&bus->bus_spin_lock);
3450 /* make sure that the BUS mutex is not locked */
3451 while (mtx_owned(&bus->bus_mtx)) {
3452 mtx_unlock(&bus->bus_mtx);
3456 /* make sure that the transfer mutex is not locked */
3457 while (mtx_owned(xroot->xfer_mtx)) {
3458 mtx_unlock(xroot->xfer_mtx);
3463 /* Make sure cv_signal() and cv_broadcast() is not called */
3464 USB_BUS_CONTROL_XFER_PROC(bus)->up_msleep = 0;
3465 USB_BUS_EXPLORE_PROC(bus)->up_msleep = 0;
3466 USB_BUS_GIANT_PROC(bus)->up_msleep = 0;
3467 USB_BUS_NON_GIANT_ISOC_PROC(bus)->up_msleep = 0;
3468 USB_BUS_NON_GIANT_BULK_PROC(bus)->up_msleep = 0;
3470 /* poll USB hardware */
3471 (bus->methods->xfer_poll) (bus);
3473 USB_BUS_LOCK(xroot->bus);
3475 /* check for clear stall */
3476 if (udev->ctrl_xfer[1] != NULL) {
3478 /* poll clear stall start */
3479 pm = &udev->cs_msg[0].hdr;
3480 (pm->pm_callback) (pm);
3481 /* poll clear stall done thread */
3482 pm = &udev->ctrl_xfer[1]->
3483 xroot->done_m[0].hdr;
3484 (pm->pm_callback) (pm);
3487 /* poll done thread */
3488 pm = &xroot->done_m[0].hdr;
3489 (pm->pm_callback) (pm);
3491 USB_BUS_UNLOCK(xroot->bus);
3493 /* restore transfer mutex */
3495 mtx_lock(xroot->xfer_mtx);
3497 /* restore BUS mutex */
3499 mtx_lock(&bus->bus_mtx);
3501 /* restore BUS spin mutex */
3502 while (drop_bus_spin--)
3503 mtx_lock_spin(&bus->bus_spin_lock);
3508 usbd_get_std_packet_size(struct usb_std_packet_size *ptr,
3509 uint8_t type, enum usb_dev_speed speed)
3511 static const uint16_t intr_range_max[USB_SPEED_MAX] = {
3512 [USB_SPEED_LOW] = 8,
3513 [USB_SPEED_FULL] = 64,
3514 [USB_SPEED_HIGH] = 1024,
3515 [USB_SPEED_VARIABLE] = 1024,
3516 [USB_SPEED_SUPER] = 1024,
3519 static const uint16_t isoc_range_max[USB_SPEED_MAX] = {
3520 [USB_SPEED_LOW] = 0, /* invalid */
3521 [USB_SPEED_FULL] = 1023,
3522 [USB_SPEED_HIGH] = 1024,
3523 [USB_SPEED_VARIABLE] = 3584,
3524 [USB_SPEED_SUPER] = 1024,
3527 static const uint16_t control_min[USB_SPEED_MAX] = {
3528 [USB_SPEED_LOW] = 8,
3529 [USB_SPEED_FULL] = 8,
3530 [USB_SPEED_HIGH] = 64,
3531 [USB_SPEED_VARIABLE] = 512,
3532 [USB_SPEED_SUPER] = 512,
3535 static const uint16_t bulk_min[USB_SPEED_MAX] = {
3536 [USB_SPEED_LOW] = 8,
3537 [USB_SPEED_FULL] = 8,
3538 [USB_SPEED_HIGH] = 512,
3539 [USB_SPEED_VARIABLE] = 512,
3540 [USB_SPEED_SUPER] = 1024,
3545 memset(ptr, 0, sizeof(*ptr));
3549 ptr->range.max = intr_range_max[speed];
3551 case UE_ISOCHRONOUS:
3552 ptr->range.max = isoc_range_max[speed];
3555 if (type == UE_BULK)
3556 temp = bulk_min[speed];
3557 else /* UE_CONTROL */
3558 temp = control_min[speed];
3560 /* default is fixed */
3561 ptr->fixed[0] = temp;
3562 ptr->fixed[1] = temp;
3563 ptr->fixed[2] = temp;
3564 ptr->fixed[3] = temp;
3566 if (speed == USB_SPEED_FULL) {
3567 /* multiple sizes */
3572 if ((speed == USB_SPEED_VARIABLE) &&
3573 (type == UE_BULK)) {
3574 /* multiple sizes */
3575 ptr->fixed[2] = 1024;
3576 ptr->fixed[3] = 1536;
3583 usbd_xfer_softc(struct usb_xfer *xfer)
3585 return (xfer->priv_sc);
3589 usbd_xfer_get_priv(struct usb_xfer *xfer)
3591 return (xfer->priv_fifo);
3595 usbd_xfer_set_priv(struct usb_xfer *xfer, void *ptr)
3597 xfer->priv_fifo = ptr;
3601 usbd_xfer_state(struct usb_xfer *xfer)
3603 return (xfer->usb_state);
3607 usbd_xfer_set_flag(struct usb_xfer *xfer, int flag)
3610 case USB_FORCE_SHORT_XFER:
3611 xfer->flags.force_short_xfer = 1;
3613 case USB_SHORT_XFER_OK:
3614 xfer->flags.short_xfer_ok = 1;
3616 case USB_MULTI_SHORT_OK:
3617 xfer->flags.short_frames_ok = 1;
3619 case USB_MANUAL_STATUS:
3620 xfer->flags.manual_status = 1;
3626 usbd_xfer_clr_flag(struct usb_xfer *xfer, int flag)
3629 case USB_FORCE_SHORT_XFER:
3630 xfer->flags.force_short_xfer = 0;
3632 case USB_SHORT_XFER_OK:
3633 xfer->flags.short_xfer_ok = 0;
3635 case USB_MULTI_SHORT_OK:
3636 xfer->flags.short_frames_ok = 0;
3638 case USB_MANUAL_STATUS:
3639 xfer->flags.manual_status = 0;
3645 * The following function returns in milliseconds when the isochronous
3646 * transfer was completed by the hardware. The returned value wraps
3647 * around 65536 milliseconds.
3650 usbd_xfer_get_timestamp(struct usb_xfer *xfer)
3652 return (xfer->isoc_time_complete);
3656 * The following function returns non-zero if the max packet size
3657 * field was clamped to a valid value. Else it returns zero.
3660 usbd_xfer_maxp_was_clamped(struct usb_xfer *xfer)
3662 return (xfer->flags_int.maxp_was_clamped);